public static int Assignment1()
{
string[] input = InputReader.ReadInputLines(2);
int validCounter = 0;
foreach (string item in input)
{
int amount1 = int.Parse(item.Split('-')[0]);
int amount2 = int.Parse(item.Split('-')[1].Split(' ')[0]);
string letter = item.Split('-')[1].Split(' ')[1].TrimEnd(':');
string passwordLetters = item.Split(':')[1].Trim();
int initAmount = passwordLetters.Length;
int finalAmount = passwordLetters.Replace(letter, "").Length;
int ifAmount = initAmount - finalAmount;
if (ifAmount >= amount1 && ifAmount <= amount2)
{
validCounter++;
}
}
return(validCounter);
}
public static int Assignment1(int yIncr, int xIncr)
{
// Initialize input
string[] input = InputReader.ReadInputLines(3);
// Initialize conversion values
int x;
int maxX = input[0].Length;
int y = 0;
int maxY = input.Length;
// Initialize other values
int treeCounter = 0;
// Convert input to 2d array
char[,] dInput = new char[maxY, maxX];
foreach (string line in input)
{
x = 0;
foreach (char symbol in line)
{
dInput[y, x] = symbol;
x++;
}
y++;
}
// Calculate movement
y = 0;
x = 0;
for (; y < maxY; y += yIncr)
{
if (dInput[y, x] == '#')
{
treeCounter++;
}
if (x + xIncr >= maxX)
{
int diff = x - maxX;
x = xIncr + diff;
}
else
{
x += xIncr;
}
}
return(treeCounter);
}
public static int Assignment1(int day)
{
LinkedList <int> numbers = new LinkedList <int>();
Stack <int> numbers1 = new Stack <int>();
LinkedList <int> numbers2 = new LinkedList <int>();
foreach (string number in InputReader.ReadInputLines(1))
{
numbers.AddFirst(int.Parse(number));
numbers1.Push(int.Parse(number));
numbers2.AddFirst(int.Parse(number));
}
while (numbers1.Count > 0)
{
int compareNumber = numbers1.Pop();
LinkedListNode <int> currentNode2 = numbers2.First;
while (1 == 1)
{
LinkedListNode <int> currentNode = numbers.First;
while (1 == 1)
{
if ((currentNode.Value + compareNumber + currentNode2.Value) == 2020)
{
return(currentNode.Value * compareNumber * currentNode2.Value);
}
if (currentNode.Next != null)
{
currentNode = currentNode.Next;
}
else
{
break;
}
}
if (currentNode2.Next != null)
{
currentNode2 = currentNode2.Next;
}
else
{
break;
}
}
}
return(0);
}
public static int Assignment2()
{
string[] input = InputReader.ReadInputLines(2);
int validCounter = 0;
foreach (string item in input)
{
int amount1 = int.Parse(item.Split('-')[0]);
int amount2 = int.Parse(item.Split('-')[1].Split(' ')[0]);
char letter = char.Parse(item.Split('-')[1].Split(' ')[1].TrimEnd(':'));
string passwordLetters = item.Split(':')[1].Trim();
if (passwordLetters[amount1 - 1] == letter ^ passwordLetters[amount2 - 1] == letter)
{
validCounter++;
}
}
return(validCounter);
}
public static int Assignment1()
{
// Read input
string[] input = InputReader.ReadInputLines(4);
// Initialize values
int validCounter = 0;
bool valid = true;
int fieldAmount = 0;
bool cid;
string[] validKeys = { "cid", "pid", "ecl", "hcl", "hgt", "eyr", "iyr", "byr" };
List <string> passportKeys = new List <string>();
// Calculate items
foreach (string item in input)
{
// Check for new passport
if (item.Equals(""))
{
if (valid)
{
validCounter++;
}
passportKeys.Clear();
fieldAmount = 0;
}
else
{
// Split item
string[] splitItem = item.Split(' ');
for (int x = 0; x < splitItem.Length; x++)
{
foreach (string passportItem in splitItem[x].Split(':'))
{
if (validKeys.Contains(passportItem))
{
passportKeys.Add(passportItem);
fieldAmount++;
}
}
}
// Initialize bool & set arraycounter
cid = passportKeys.Contains("cid");
// Check for correct fields
if (cid && fieldAmount == 8)
{
valid = true;
}
else if (fieldAmount == 7 && !cid)
{
valid = true;
}
else
{
valid = false;
}
}
}
if (valid)
{
validCounter++;
}
return(validCounter);
}
public static int Assignment2()
{
// Read input
string[] input = InputReader.ReadInputLines(4);
// Initialize values
int validCounter = 0;
bool validItems = true;
bool valid = true;
int fieldAmount = 0;
bool cid;
string[] validKeys = { "cid", "pid", "ecl", "hcl", "hgt", "eyr", "iyr", "byr" };
string key = "";
List <string> passportKeys = new List <string>();
// Calculate items
foreach (string item in input)
{
// Check for new passport
if (item.Equals(""))
{
if (valid && validItems)
{
validCounter++;
}
passportKeys.Clear();
fieldAmount = 0;
validItems = true;
}
else
{
// Split item
string[] splitItem = item.Split(' ');
for (int x = 0; x < splitItem.Length; x++)
{
foreach (string passportItem in splitItem[x].Split(':'))
{
if (validKeys.Contains(passportItem))
{
key = passportItem;
}
else
{
bool validItem = false;
// Ugly switch case for ugly needs
switch (key)
{
case "cid":
validItem = true;
break;
case "pid":
if (passportItem.Length == 9)
{
validItem = true;
}
break;
case "ecl":
bool ambblu = passportItem.Equals("amb") || passportItem.Equals("blu");
bool brngry = passportItem.Equals("brn") || passportItem.Equals("gry");
bool grnhzloth = passportItem.Equals("grn") || passportItem.Equals("hzl") || passportItem.Equals("oth");
if (ambblu || brngry || grnhzloth)
{
validItem = true;
}
break;
case "hcl":
char firstSymbol = passportItem[0];
char[] validBetChars = { 'a', 'b', 'c', 'd', 'e', 'f' };
char[] validIntChars = { '1', '2', '3', '4', '5', '6', '7', '8', '9', '0' };
string restOfString = passportItem.Remove(0, 1);
if (firstSymbol == '#' && restOfString.Length == 6)
{
foreach (char symbol in restOfString)
{
if (validBetChars.Contains(symbol) || validIntChars.Contains(symbol))
{
validItem = true;
}
else
{
validItem = false;
break;
}
}
}
break;
case "hgt":
if (passportItem.Length == 5)
{
if (passportItem[3] == 'c' && passportItem[4] == 'm')
{
int length = int.Parse(passportItem.Split("cm")[0]);
if (length >= 150 && length <= 193)
{
validItem = true;
}
}
}
else if (passportItem.Length == 4)
{
if (passportItem[2] == 'i' && passportItem[3] == 'n')
{
int length = int.Parse(passportItem.Split("in")[0]);
if (length >= 59 && length <= 76)
{
validItem = true;
}
}
}
break;
case "eyr":
if (int.Parse(passportItem) >= 2020 && int.Parse(passportItem) <= 2030)
{
validItem = true;
}
break;
case "iyr":
if (int.Parse(passportItem) >= 2010 && int.Parse(passportItem) <= 2020)
{
validItem = true;
}
break;
case "byr":
if (int.Parse(passportItem) >= 1920 && int.Parse(passportItem) <= 2002)
{
validItem = true;
}
break;
}
if (validItem)
{
passportKeys.Add(key);
fieldAmount++;
}
else
{
validItems = false;
}
}
}
}
// Initialize bool
cid = passportKeys.Contains("cid");
// Check for correct fields
if (cid && fieldAmount == 8)
{
valid = true;
}
else if (fieldAmount == 7 && !cid)
{
valid = true;
}
else
{
valid = false;
}
}
}
if (valid && validItems)
{
validCounter++;
}
return(validCounter);
}